Head-to-head evidence comparison — which supplement is right for you?
Vitamin B6 wins 1 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
100-200mg daily
Morning with food, Can be divided into two doses
Pycnogenol (standardized extract)
25-100mg daily
Morning with food, Can take with other B vitamins
P-5-P (Pyridoxal-5-Phosphate)
4-8 weeks
6-12 weeks
4-8 weeks
Initial use
2-4 weeks
1-2 cycles
Months of high doses
Phlebotonics for venous insufficiency
The Cochrane database of systematic reviews (2020) · Meta analysis · n=7690
Pooled data suggest that phlebotonics probably increase adverse events slightly, compared to placebo (RR 1.14, 95% CI 1.02 to 1.27; 37 studies; 5789 participants; moderate-certainty evidence).
Pine bark (Pinus spp.) extract for treating chronic disorders
The Cochrane database of systematic reviews (2020) · Meta analysis · n=1641
In a mixed group of participants with type 1 and type 2 DM we do not know whether pine bark extract decreases HbA1c (MD -0.20 %, 95% CI -1.83 to 1.43; one study; 67 participants; very low-certainty evidence).
Effect of pycnogenol supplementation on blood pressure: A systematic review and meta-analysis of clinical trials
Phytotherapy research : PTR (2020) · Meta analysis · n=922
Pooled analysis suggested that pycnogenol supplementation can reduced systolic blood pressure (SBP) of (-3.22 mmHg; 95% CI [-5.52, -0.92]) and diastolic blood pressure (DBP; -1.91 mmHg; 95% CI [-3.64, -0.18]).
Dosage exploration of combined B-vitamin supplementation in stroke prevention: a meta-analysis and systematic review
The American journal of clinical nutrition (2024) · Meta analysis · n=76664
In areas without and with partial folic acid fortification, combined B-vitamin supplementation significantly reduced the risk of stroke by 34% [RR: 0.66; 95% confidence interval (CI): 0.50, 0.86] and 11% (RR: 0.89; 95% CI: 0.79, 1.00), respectively.
Effects of Vitamin B12 Supplementation on Cognitive Function, Depressive Symptoms, and Fatigue: A Systematic Review, Meta-Analysis, and Meta-Regression
Nutrients (2021) · Meta analysis · n=6276
Further, meta-regression showed no significant associations of treatment effects with any of the potential predictors.
Vitamin and mineral supplementation for maintaining cognitive function in cognitively healthy people in mid and late life
The Cochrane database of systematic reviews (2018) · Meta analysis · n=83000
We found that giving B vitamin supplements to cognitively healthy adults, mainly in their 60s and 70s, probably has little or no effect on global cognitive function at any time point up to 5 years (SMD values from -0.03 to 0.06) and may also have no effect at 5-10 years (SMD -0.01).
Vitamin B6 has a higher evidence score (9/10 vs 9/10) and wins in 1 of 3 categories.
Both Pine Bark Extract and Vitamin B6 score equally (70) for hormonal balance.
No known interactions between Pine Bark Extract and Vitamin B6 have been documented in our database. However, always consult a healthcare provider before combining supplements.